Why is the account name not displaying in the activity report?

Why is the account name not displaying in the activity report?

I am trying to create an Activity report to display all activities (Events) that has a subject that contains "Demo" and a Start DateTime of Tomorrow Onwards. The columns I am displaying are as follows: Subject; Start DateTime; End DateTime; Potential Name; Account Name; Company (from Leads); Activity Owner; Account Owner, Account Type and Stage (Potential). The Module I started with was Activities and also associated Leads, Potentials and Accounts.

First I created an Account, then on that Account I created a Potential, then on that Potential created an Event with the subject Demo: test, a start date of March 5, 2013 and end date of March 5, 2013. I made myself the owner. When I run the report I get a "-" as the Account Name, Account Owner and Account Type.

How can I get this data to display?